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Pinning down the mechanism of neutrinoless double beta decay with measurements in different nuclei
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A measurement of neutrinoless double beta decay in one isotope does not allow to determine the underlying physics mechanism. We discuss the discrimination of mechanisms for neutrinoless double beta decay by comparing ratios of half life measurements for different isotopes. Six prominent examples for specific new physics contributions to neutrinoless double beta decay are analyzed. We find that the change in corresponding ratios of half lives varies from 60% for supersymmetric models up to a factor of 5-20 for extra-dimensional and left-right-symmetric mechanisms.
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Cited by 4 Pith papers
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Derives non-relativistic effective field theories for scalar fields with arbitrary potentials, provides an effective fluid description, and extends the formalism to cosmology for ultra-light dark matter models.
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Beyond Half-Life Limits: Robust Operator-Level Interpretation of Multi-Isotope Neutrinoless Double-Beta Decay
Among tested operators, light-Majorana exchange gives the most stable multi-isotope coefficient limits and half-life ratios; selected dim-6 operators are intermediate; short-range dim-9 examples can be highly NME- and...
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Positron-Emitting and Electron-Capturing Double-Beta Processes in the Standard Model and Beyond
Nuclear matrix elements and phase-space factors are computed for 2ν and 0ν positron-emitting double-beta modes in three isotopes, yielding sensitivity to SMEFT lepton-number-violating operators at 1-100 TeV and showin...
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